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No. 373,9501' Patent d Nov. 29, 1887.

e Wm M a UNITED STATES PATENT rrrcn.

CHARLES H. SWEET, OF LAMAR, MISSOURI.

'STOVE=PIPE JOINT.

SPECIFICATION forming part of Letters Patent No. 373,950, dated November29, 1887.

' Application filed July 9, 1887. Serial No. 243.875. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES H. SWEET, a citizen ofthe United States.residing at Lamar, in the county of Barton and State of Missouri, haveinvented a new and useful Improvement in Stove-Pipe Joints, of which thefollowing is a specification.

My invention relatesto improvements in joints for stove-pipes; and itconsists in a certain novel construction and arrangement of parts forservice, 'fully described hereinafter, and specifically pointed out inthe claim.

In the drawings, Figure 1 is a side View of a stove-pipe embodying myimprovements. Fig. 2 is a section on the line as x of Fig. 1. Fig. 3 isa transverse section of the same, line y y, Fig. l.

Referring by letter to the drawings, A designates the lower and smallersection of stovepipe, and A represents the upper and larger section, theupper end of the said lower section 7 being passed into the lower end ofthe upper section.

O designates a hollow rib, of sheet metal, which is soldered or rivetedon the side of the section A and extends longitudinally of the saidsection for a considerable distance from the lower end up, and the outerside of the said rib is provided with a series of perforations, c 0,extending the entire length of the rib.

' D designatesa sleeve or collar fitting around the upper section, A, ofthe pipe, and having an offset, cl, therein to receive the rib on thesaid pipe, and E represents an angular tube communicating at the upperend with the said offset in the sleeve D and attached at the lower endto the pipe A, some distance from the upper end thereof. The said hollowrib O, which is angular to fit the angular tube E, is adapted to slidewithin the said tube, (the rear side of the same being open,) and itwill be seen that the lower pipe will telescope within the upper pipe,(the upper pipe moving in the sleeve D,)

and the said pipes will be held from-turning with respect to each otherby the rib sliding in the said tube or guide E. .The offset d isprovided with a small perforation, d, and G designates a leaf-springpivoted at the lower end to the outer side of the tube or groove E, andhaving the pin H in the upper end to fit into the perforation d in theoffset d and also pass into one of the perforations c in the rib C. Itwill be seen that any one of the perforations 0 may be aligned with theperforation d in the offset, and therefore the pipes A A may be adjustedto the desired extension and locked in that position by thespring-actuated pin H. The lower end of the spring G being pivoted tothe outer side of the tube or groove E, when it is desired to adjust thepipes the said spring may be withdrawn from the perforation d and turnedaside out of the way.

It will be seen from the above that any desired adj ustment of the pipesmay be made, and yet all the means of adjustment are on the outside ofthe pipe, and therefore do notinterfere with the use thereof. Owing tothe arrangement of the parts of the invention the said pipes cannot-turnin relation to each other, and

therefore the perforations c in the rib 0 never pass out of alignmentwith the perforation d in the offset d, except longitudinally, as willbe seen. There is no perforation of the pipe in this arrangement of theadjusting means, and therefore there is no chance of any escape of gasor smoke into the room.

Having thus described my invention, what I claim is- In a s. ove-pipecoupling, the combination of the pipe A, having the angular hollow rib Oon the side, provided with the perforations c c, the pipe A, slidingwithin the said pipe A, collar or sleeve D around the said pipe A,provided with an offset, d, to fit around and slide on the rib O andhaving a perforation, 01, therein, the tube or groove E, attached at thelower end to the section A and at the upper end to the collar or sleeveD and communicat ing with the said offset d, and the pivoted CHARLES H.SWEET.

Witnesses:

SAML. N. SMooT, DANIEL PERRINE.

